Precaution:
As the ext is still in development, major changes still can be applied which could require full extension purging and reinstallation, so use it on your own risk. DO NOT install it on production boards. For testing purposes only.

Requirements:

PHP >= 5.3.3

phpBB >= 3.1.0

Installation:

Download the latest release

Create a new folder in the /ext/ directory, named: mickroz(If it doesn't exist already)

Create a new folder in /ext/mickroz/ named mchatmeaddon

Copy the contents from the mchatmeaddon folder from your download into /ext/mickroz/mchatmeaddon/

The main extension class should now be at: root/ext/mickroz/mchatmesaddon/composer.json

Nagivate in the Administration Control Panel (ACP) to Customise -> Manage Extensions

Look for mChat /me Addon in the Disabled Extensions list and click Enable!

Hello!!
sorry for my english I'm from Fraance
let me just tell you that I've try this mchat exxtension for 3 days whith the team of my phpbb forum (on 3.2 phpbb forum version) and it works perfectly included with the "lmchatrooms" extension
regards